💫 About Me:

I am a 3rd-year B.Tech Electrical Engineering student at KDK College of Engineering, Nagpur.
My core interests lie at the intersection of Power Electronics,Industrial Automation (PLC/SCADA), and Data Science.
I am passionate about building efficient electrical systems and leveraging data-driven insights to solve complex engineering problems.
Currently, I am expanding my expertise through projects in VLSI design and participating in the Aspire Leaders Program (Cohort 1).

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⚡ Project Overview: 3-Phase Fully Controlled Rectifier

This repository contains a MATLAB/Simulink model of a 6-pulse thyristor bridge. It is designed to convert 3-phase AC into a controllable DC output by adjusting the firing angle ($\alpha$).

⚡ Circuit Diagram

▶️ How to Run the Simulation

1. Open MATLAB R2021a or later.
2. Navigate to the project directory.
3. Open the Simulink model file:
4. Set the firing angle α in the Pulse Generator blocks.
5. Click Run to observe input voltage, output voltage, and load current waveforms.

🔍 Key Features:

• Circuit Topology: 6-Thyristor bridge configuration for full-wave rectification .
• Control: Uses six synchronized Pulse Generators for precise SCR triggering .
• Load: Includes a Series RL Load to study inductive filtering and current behavior .

📊Simulation Results & Analysis

The waveforms demonstrate the transition from AC to DC:

• Input Voltage: Shows the three-phase sinusoidal input with switching transients .
• Output Voltage (Yellow): Shows the 6-pulse rectified DC waveform .
• Load Current (Purple): Shows a smoothed DC current due to the inductive load .

🔁 Comparative Study: Effect of Firing Angle (α)

Firing Angle (α)	Average Output Voltage (Vdc)	Observation
30°	High	Near-continuous conduction
60°	Medium	Increased ripple
90°	Low	Reduced DC output

As the firing angle increases, the average DC output voltage decreases, validating the theoretical relationship between Vdc and α.

Key Observations

• Increasing firing angle α reduces the average DC output voltage.
• The RL load ensures smoother current due to inductive filtering.
• Output voltage ripple increases with higher firing angles.
• System demonstrates 6-pulse rectification characteristics.

Detailed Analysis

👉 Download Full Waveform Result (PDF)

Mathematical Model

The average output voltage ($V_{dc}$) is calculated as:

$$ V_{dc} = \frac{3\sqrt{3}V_m}{\pi} \cos(\alpha) $$

Future Scope

• Harmonic analysis and Total Harmonic Distortion (THD) evaluation.
• Closed-loop control using PI/PID controller.
• Hardware implementation using SCR triggering circuits.
• Comparison with uncontrolled and semi-controlled rectifiers.

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📌 This project demonstrates the practical application of power electronics principles through simulation-based analysis.